发明名称 |
Jitter measurement method, jitter measuring apparatus and image forming apparatus |
摘要 |
The present invention measures jitter in a galvano scanner that scans a light beam on a surface to be scanned by periodically turning a reflection mirror in a reciprocating manner. Two detectors for detecting and receiving the light beam are mounted near both ends of the scan region of the light beam, a first detection signal of each of the two detectors is extracted whenever the reflection mirror is activated for one scanning, a required time for one scanning is computed from the extracted detection signals, and a variation in the required time for each scanning is measured based on the computed required time.
|
申请公布号 |
US7469191(B2) |
申请公布日期 |
2008.12.23 |
申请号 |
US20050195466 |
申请日期 |
2005.08.01 |
申请人 |
SUMITOMO PRECISION PRODUCTS CO., LTD. |
发明人 |
SHIMODA KYOJI;SAITO KOICHI |
分类号 |
G01R29/26 |
主分类号 |
G01R29/26 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|